Brake rigging for rail cars



Oct. 30,1923.

M. c. FR INS ET AL BRAKE RIGGING FOR RAIL CARS Filed March 9. 1922 2Sheets-Sheet 1 I I I I INVENTO 1% 1 c Z 4% BY INVENTORS Oct. 30 1923.

M. C. FRINS ET AL BRAKE RIGGING FOR RAIL CARS 2 Sheets-Sheet 2 FiledMarch 9, 1922 w g e- To all whom it may conce to provide a brakePatented Oct. 3c, 1923.

- BRAKE RIGGING Application filed March 9,

Be it known that we, Mknmmm C. Fans? and CHARLES F. DRUMM, Jr.citizens'oftheiUnite'd States, respectively residing in the borough ofManhattan and in the borough of Queens of the city of New York, in theState of New York, have invented certain new and Brake Rigging for RailCars, of which the followin is a specification, reference beinghad-to te accompanying drawings, form- 111 a part hereof.

The present invention has for its object rigging in which are whichshall lend itself and effective applicaon the bogey truck of employedair brakes, readily 'to convenient tion to andoperation a. rail car. Theinvention is designed primarily-with reference to its application torail cars propelled by an internal combustion cngine,.although it willbe evident as the description roce'eds that it is not to be so limited.ore particularly, the invention seeks to provide such a rigging which 1shall be of simple construction, invariable in operation, and capable ofapplying uni form braking pressures per unit area to all of the wheelsof the bogey truck both one,

and a curved track. In acstraight-awa h the invention it is proposed'tocordanc'e wit provide air cylinders at opposite sides of the truck anddirectly between two wheels on a side, respectively, and mountoppositely pistons in the cylinders to. which are pivote rods connecteddirectly to the respecive brake shoes. The cylinders are themselvessupplied with air at the same presat opposite sides of the truck.

sure so that the unit pressure on each of the vfour pistions, in anypair of cylinders, is uniform and the bra in pressure of any of the fourbrake'shoes o? a set is the same. This uniformity'of application isfurther facilitated by means of transverse tie rods extendingtransversely between the brake shoes which operate on correspondingwheels A further feature of the invention has to do 'withwhat may betermed the flexible mounting of the brake shoes and the flexibleconnections between them and the respective operating pistons wherebythe ressure is a plied uniformly throughout t e surface 0? the shoe andthe shoe adapts i self -auto-' matically to the wheel tread without theimposition of unbalanced stresses.

useful Improvements in q wheels at, a ,'and a",

reference to one as illustrated in suitable embodiment thereof thedrawings wherein:

Figure 1 is a view in side elevation of a bogey truck showing so much ofthe improved rigging as is applied to two of the wheels on one side ofthe truck.

Figure 2 is a View in plan of a four wheel bpgey truck showing theimproved brake r1 gang.

igure 3 is a view on a somewhat larger scale, partly in side elevationvertical section, and showing particularly the internal construction ofone of the air cylinders at one side of the truck.

described with and partly in Figures 4 and 5 are detailed views insection taken .on the planes indicated by the lines 44 and 5-5 in Figure3 and lookmg in the direction of the arrows.

V The ogey truckindicatd generally at a in Figure 2 is of conventionalform adapted for application to the front end of the chassis of a railcar propelled by an internal combustion engine. It will be understoodthat a suitable bolster will be mounted on the bogey truck a and supportthe chassis through suitable vehicle springs and a swiveled connectionby which the truck may adapt itself to curves in the track in accordancewith known practice. The invention is not to be limited to thedetails of construction of the truck a nor to the number of wheels-a, aa (1, provided there for but for the purposes of this application it isconvenient to illustrate two axles b, .c. on the opposite ends of whichare mounted a, respectively. The general object of the present inventionis to rovide a brake riggin including rakes, for the four whee s, whichshall be of simple construction and insure the application of uniformpressures per unit area to all of the four wheels. In accomplishing thisresult there are mounted at opposite sides of the truck a air cylindersd, 6, directlybetween the respective wheels a, a and a". a, and withtheir axes in such relation to su'chwheels as to insure proper operationof brakes throu h the instrumentality of said cylinders. olts d, e, maybe employed to securethe frame members a, a", respectively, of the bogeytruck a" 1 The brake shoes f, f, f", f, are hung in operative positionwith respect to the several air - cylinders to the side to therespective shoes several shoes f,

. inder d has disposed .means of p1ns z z stems m, 0, respectivel wheelsa, aF, a, a, through -links f, f, f, f, respectively. These links areivotally supported on pins g, g, g, g, which are journaled removably insplit bearings h, h, h, h, bolted on to the side frame members a a, ofthe truck a in proximity f l g-f f- The f f f3, are plvotally hung it)",i respectively, y etc. Extending between the brake shoes f, 7, andbetween the brake shoes 1",), are transverse tie rods 70, Z,respectively, whereby the shoes are prevented from tipping and slidingoff the wheels.

The brake operating means will now be considered with special referenceto Figs. 3 and 4 which show the'internal construction of one of thebrake cylinders d, it being understood that the other brake cylinder eis similarly constructed and its parts disposed in similar operatingrelation to the brake shoes between which it is disposed. The cylthereinopposed pistons m, o, of equal areas and movable in opposite directionsunder the pressure of air admitted therebetween through the supply pipep. These pistons have secured rigid y thereto which are journaledslidably in exten ed bearing sleeves d cast in the end walls of the aircylinder. The pistons are thus guided in their movements and heldagainst any distortion or jamming. However, they are nected to therespective brake shoes f, 7", in order that the shoes may conform to thewheels and apply pressure thereto uniformly through the contactingsurfaces. The outer ends of the stems m, 0, of the pistons are bored outas at m, 0 to receive the rigid arms 7, of the respective shoes f, f,these arms being pivotally conneoted to the respective stems as at m 0The clearance between the arms f", f and the walls of the stems m, 0',which they enter is suflicient to permit such angular movement therebeonthe links i tween as may be necessary for adaptation of the shoes to thecurved treads of the wheels, having 1n mind that the shoes are pivotallhung from the pins 11', i Springs g, g which-may be of spiral form mayencircle the extended 7 bearing pivotally con- March, A. D. 1

sleeves (2 etc'., and seat on the opposite end walls of the cylinder dand press against the rear sides of the respective pistons m, 0,

force them towards'the mid-section'of the cylinderand hold the brakesreleased.

Air is supplied to the cylinder e atthe other side of the truck througha'pipe p. which is in common with the pipe p so that air at the samepressure may be applied simultaneously to the two cylinders d, e.

In 0 era tion, two cy inders (1,6, and between the opposed pistonsdisposed movably therein, as exemplified by the pistons m,o, thesepistons will move outwardly against the action of their respectiverest-raining springs, such as q, q, and the brake shoes will,bedirectly; applied. The shoes are d'sposed in the same vertical planes asthe axis of the respective air cylinders and the forces applying thebrakes operate in these planes and directl on the shoes. Uniformapplication of al the brake shoes. with an equal pressure per unit areais insured by the construction de scribed and by the pivotal connectionbeso as to normally connected to a source of air supply P when air isadmitted to the I tween the respective pistons andshoes as exemplifiedby the pins m 0 The scope of the invention will appear from the appendedclaim.

What we claim is:

A brake rigging for a bogey truck, comprising a brake cylinder locatedbetween a pair of wheels on one side of the truck, 0pposite-ends of thecylinder being rovided with 'an elongated bearing ex-ten ing inwardly ofthe c linder for a substantial distame, a air 0 piston rods slidable inthe elongate bearings, respectively, the outer ends of the piston rodsbeing hollowed out, an arm pivoted at the inner end of each hollowed outportion, a brake shoe directly connected with said arms, and links,pivoted to each brake shoe and to the frame of the truck, for en portingthe brake shoes.

This speci cation signed this 7th day of 922. MAXIMILIAN c. rams.CHARLES F. DRUMM, JR.

